Water-tube boiler.



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J. L. BUTLER da N. SLEE.

WATER TUBE BOILER.

APPLICATION FILED APB.. 8, 1907. L Patented Jan.10,1911.

WITNEssVEs MMM/@IW/ J. L. BUTLER n N. SLEE.

WATER TUBE BOILER.

APlLIoATIoN FILED A1 R.8, 1907.

@ Patented Jan. 10, 1911.

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JAMES L. BUTLER, 0F AKRON, AND NORMAN SLEE, OF BARBERTON, OHIO, ASSIGNORS TO THE BABCOCK & WILCOX COMPANY, OF NEV YORK, N. Y., A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

WATER-TUBE BOILER.

`Patented Jan. 10, 1911..

Application led April S, 1907. Serial No. 366,89*?.

A Ohio, have invented a new and useful Improvement in Tater-Tube Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part -of this specification, in which Figure l'is a longitudinal vertical section of a boiler constructed iii-accordance with our invention; and Fig. 2 is a front elevation of the same one-half-in vertical crosssection.

Uur invention relates to providing a water tube boiler suitable for locations where considerable power is demanded with very limited head room.

In the drawings, 2 represents a transverse steam and water drum, and 3 a mud drum located somewhat below the steam and water drum and a considerable distance to the rear thereof. These two drums are connected by sets of tubes, o'f which we have shown three, namely, 4, 5 and 6, these sets being separated by battles 7 and8. The furnace 9 is in front of the tubes and drums and below the level off-the drum 2, being of the usual external type as used onA Stirling boilers.V

In addition to the brid e wall 10 at the rear of the furnace, we pre erably. employ .a rear bridge wall 11 in front of the mud drum 3, which protects the mud drum and prevents leakage of gases directly to the stack opening 12. The front part of the boiler is preferably supported uponuprights or columns 13, which may be embedded in 4the side walls 14, as shown in Fig. 2. In this figure, 15 is the fire brick or refractory lining of the Wall setting.

In the use of the boiler, water is preferably fed into the rear drum and there will be a circulation forwardly and upwardly through the tubes 4, and a circular circulationrearwardly and downwardly through the tubes 6. There is probably van up and vdown circulation among the tubes 5, being `up through some of the tubes and down through others. The flame and -products of combustion pass rearwardly in a horizontal direction among the horizontally extending tubes 4 to the rear end of the baille 7 thence flow forwardly among the tubes 5 until they reach the forward end of the balile 8, and

thence pass rearwardly among the tubes 6 to the outlet flue 12.

The advantages of our invention result from the large capacity or horse power which'is obtained with very low head room. By usingthe two drums and the horizontally extending curved tubes arranged in sets, and entering said drums, we can obtain a good clrculation and economy, while at the same time the boiler may be placed 1n sltuations which could not rece-ive boilers of ordinar types. 4 v

h' any changes may be made in the form and arrangement of the' drums, tubes, furnace, &c., without departing from our invention.

We claim :M

1. A water tube boiler comprising a front transverse steam and water drum and a rear transverse mud drum connected thereto by sets of horizontally extending tubes having reversely curved end portions, a combustion chamber in front of the steam and Water, drum, andV two horizontally extending baffles extending between the tubes in opposite directions from the two drums and overlapping each other, dividing the tubes'into three sets and giving the gases three horizontal passes among the tubes, substantially as described.

2. A water tube boiler comprising a front 'of the upper tubes, substantially as described.

3. A Water tube boiler comprising a front transverse steam and water drum, a rear transverse mud drum ata slightlylower level, three sets of horizontally extending tubes having reversely curved ends connecting the drums and each havin a plurality of rows, a furnace arranged in ront of the steam and water drum and opening into the space occupied by the forward curved ends of the lower baiiie, and a deflector-bridge wall inv front of the mud drum to protect and prevent short-circuiting of gases, the rear wall having an o-take port in the rear of the upper set of tubes, all the water tubes connecting thetwo said drums, substantially as'l described..

4. A water tube boiler comprising a setting, a transverse mud drum at ythe bottom and back of the setting, a transverse steam and water drum at the front and top of the setting, at least three sets of substantially horizontal .tubes connecting the drums, a furnace in front of the setting and communieating with the space below the tubes, and baffles disposed to provide a rearward pass containing the lower set of tubes, a forward pass containing the intermediate set of tubes, and a rearward and downward pass containing the upper set of tubes, and an out-let at the rear of the downwardly extending portion of the upper pass, substantially as described.

In testimony whereof, we have hereunto set our hands.

JAMES L. BUTLER. NORMAN SLEE. Witnesses:

A. H. KiRKLAND, M.' E. HAMLIN. 

